JED - December 2009 - (Page 15)

th e ONR ISSUES JCREW TECHNOLOGY BAA The US Navy’s Office of Naval Research (Arlington, VA) has released a new Broad Agency Announcement (BAA) for the Joint Radio Controlled Improvised Explosive Device Electronic Warfare (JCREW) 3.3 Technologies program. The BAA describes the technologies the Navy wants to develop for the next generation of IED jammers. It also provides some critical insight into the capabilities these systems may provide in the field. Counter-IED requirements continue to evolve based on operational experience in Iraq and Afghanistan, and the BAA sheds some light on the capabilities desired in future IED jammers. Perhaps the most significant requirement is the ultra-wide frequency coverage described in the BAA. The Navy wants its next generation of IED jammers to defeat RF IED triggers operating from the mid-Low Frequency (LF) to the midExtremely High Frequency (EHF) range. The Navy is seeking to develop compact IED jammers that will perform direction finding and geolocation of threats and provide jamming power on the order of “10s of Watts” in dismounted (manpack) configurations and “100s of Watts” in mounted configurations. The IED jammers must be able to communicate with one another and form ad-hoc networks for distributed electronic support and electronic attack coverage. Another goal is to minimize jamming fratricide impact on friendly communications and signals intelligence systems. The BAA highlights several technology areas that cover nearly all aspects of future CREW systems. In the area of antenna technologies the BAA calls for compact, lightweight, multi-function apertures that feature high efficiencies, low visible signatures and high linearity. The antenna should offer “adaptive, dynamic control of antenna patterns, m o n i t o r news The Journal of Electronic Defense | December 2009 including gain pattern, directivity and polarization.” In addition, “techniques for increasing isolation at the antenna between collocated transmit and receive apertures to support simultaneous transmit and receive (STAR) are also desired.” The BAA also calls for advanced receiver/transmitter technologies that provide extremely broadband coverage, wide instantaneous bandwidth, high dynamic range and small resolution bandwidths. Receivers should be “capable of instantaneous bandwidth on the order of 500 MHz/channel, dynamic range >10 bits, and resolution bandwidth on the order of 1-20 KHz.” Transmitters should provide greater than 100 MHz per channel instantaneous bandwidth, efficiencies of greater than 40 percent, high linearity, and multiple signal and frequency simultaneous transmission. “ Future JCREW systems will require signal generation subsystems that can generate “multiple simultaneous and coherent jamming waveforms with low noise” in response to threats. “These jamming responses will require high speed activation at up to GHz bandwidths and digitally controllable pa- rameters and waveform selection to facilitate integration into closed loop architectures,” according to the BAA. To meet this need, program officials are interested in direct digital synthesizer (DDS), arbitrary waveform generator (AWG) and digital RF memory (DRFM) technologies or a hybrid approach among them. “Software defined radio (SDR) approaches which support the generation of both EW waveforms and communications from a common waveform generator are of particular interest.” Under the heading, “Comprehensive Spectral Awareness,” the BAA describes several specific areas, including spectral mapping, signal assessment system, direction finding and geolocation, as well as “situational awareness data fusion.” This last topic calls for capabilities and techniques that can combine off-board information (EO/IR and ISR) and onboard JCREW sensor data to detect, locate and identify possible threats. Electromagnetic compatibility is also an area of interest, including “JCREW network centric operations.” According to the BAA, “The ability for JCREW systems to communicate with one another, as well as to both communicate

Table of Contents for the Digital Edition of JED - December 2009

JED - December 2009
Table of Contents
The View From Here
From the President
The Monitor
Washington Report
World Report
2010 EW/SIGINT Resource Guide
What’s New in SIGINT Software?
EW 101
AOC News
AOC Industry/Institute/University Members
Index of Advertisers
JED Sales Offices
JED Quick Look

JED - December 2009